Rejetto,
This is probably repetetive coding. "If check marked, set lock icon". Even though they eventually do the same thing, some people prefer to "set" to anyone (my preference). This is a visual that tells me that I have set permissions. Maybe you should add an icon of an "OPEN" lock for the anyone flag and or leave blank. My opinion (I restate it is my opinion only) is to force users to choose the anyone flag. It's a verification that you set a permission to your folder.
Thank you for the great software. Still learning to play with it